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Is a Relay Needed?

 
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Don.Alexander(at)astenjoh
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PostPosted: Wed Feb 15, 2006 5:28 am    Post subject: Is a Relay Needed? Reply with quote

I am getting ready to wire up my Ray Allen stick control buttons. One
of the functions that I am using will be for the flaps. (RV-Cool I have
tested the flap motor without an "air" load on the flaps and get a bit
over two amps when running. Ray Allen indicates that their switches are
rated for five amps. Do I need to include a relay in my circuit with
this sort of margin?
Regards,
Don Alexander


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nuckollsr(at)cox.net
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PostPosted: Wed Feb 15, 2006 6:42 pm    Post subject: Is a Relay Needed? Reply with quote

At 08:08 AM 2/15/2006 -0500, you wrote:

Quote:

<Don.Alexander(at)astenjohnson.com>

I am getting ready to wire up my Ray Allen stick control buttons. One
of the functions that I am using will be for the flaps. (RV-Cool I have
tested the flap motor without an "air" load on the flaps and get a bit
over two amps when running. Ray Allen indicates that their switches are
rated for five amps. Do I need to include a relay in my circuit with
this sort of margin?
Regards,
Don Alexander

Yes. Inrush currents on your motors are perhaps 10x bigger
than running currents. Suggest you pick from among the varieties
at:

http://www.aeroelectric.com/PPS/Flight/Flaps/Flaps.pdf

Bob . . .


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Erich_Weaver(at)URSCorp.c
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PostPosted: Thu Feb 16, 2006 4:15 pm    Post subject: is a relay needed? Reply with quote

Quote:
I am getting ready to wire up my Ray Allen stick control buttons. One
of the functions that I am using will be for the flaps. (RV-Cool I have
tested the flap motor without an "air" load on the flaps and get a bit
over two amps when running. Ray Allen indicates that their switches are
rated for five amps. Do I need to include a relay in my circuit with
this sort of margin?
Regards,
Don Alexander

Don:

Im doing a similar set up on my RV-7A. Make your life easy - Vans has a
flap controller circuit board all ready for you. Check it out at:

http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1140134994-90-39&action=search

Erich Weaver


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